<meta charset = "utf-8">
<select>
<script>
	var ar = ["子鼠","丑牛","寅虎","卯兔","辰龙","巳蛇","午马","未羊","申猴","酉鸡","戌狗","亥猪"];

	for(var i=0;i<ar.length;i++){
	document.write("<option>"+ar[i]+"</option>");
}
</script>
</select>